Boiler Fires For Hot Water But Not For CH, Please Help

[joben1]

Hi,

My boiler fires when hot water called for but doesn't when central heating called for.

I have replaced the room thermostat but problem persists.

My system:
Albion Mainsflow Integrated Thermalstore Combipack (Kit 1 I believe, no Zone Valve)
Ideal Classic FF260 Boiler
Landis & Gyr RWB270 Timer
Landis & Gyr Rad1.N thermostat

Any help much appreciated.

Paul

 

[crashndie]

hi how many pumps do you have?

 

[crashndie]

hi how many pumps do you have? if you have 2 check that both are running if its not check for voltage to the pump if you have voltage at the pump then the pump is dead, if you have no voltage then the timer is duff

 

[joben1]

I have 2 pumps and thanks for your help. Will do as you say.